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MINERALS AND ITS USES

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MINERALS

MINERALS AND ITS USES

elvira lopez rivera
1

materials properties minerals granite rocks

Minerals are the natural that make up most .
Rocks can be made up of one or more .
For example , is made up of three minerals : quartz , feldspar and mica .
We can identify minerals by their : colour , density , shape , lustre and hardness .

2

colour Calcite Azurite

COLOUR
Some minerals can be recognised by their , but others can occur in a variety of different colours .
is blue .
can be orange , green or white .

3

galena mass bauxite density centimetre volume

DENSITY
It is the relationship between the of the mineral and its . Density is measured in grams per cubic ( g / cm3 ) .
Every mineral has a specific .
The density of is 2 . 5 g / cm3 .
The density of is 7 . 5 g / cm3

4

Salt shapes Malachite

SHAPE
Some minerals have regular . Others have irregular shapes .
hasan irregular shape .
has a regular shape ( cubic crystals ) .

5

shiny Pyrite Talc

LUSTRE
Some minerals are . This is called lustre . Others have no lustre .
is very shiny . has no lustr e

6

Mohs hard Gypsum soft Diamond

HARDNESS
Minerals that are not easily scratched are .
Minerals that are easily scratched are .
is the softest mineral . We can scratch it with a fingernail .
is the hardest mineral .
We can measure the hardness of minerals using the scale .

7

metals electronic ore computers components jewellery salt magnetite gemstones substances

People use minerals in many different ways .
To obtain . Metals are extracted from minerals . An of a metal is a mineral from which the metal is extracted . For example , is an iron ore .
To make . Metals such as gold and silver are used to make jewellery . Diamonds and rubies are valuable .
To obtain other . We use minerals to obtain for cooking , graphite for pencils , to make plaster , etc .
To make components . Almost all electronic in devices such as or mobile phones are made from minerals .